You can solve this by dividing the baches into the total amount of donuts.
147/7=21
Each batch has 21 donuts.
Using order of operations, the answer is 569.
44.4 miles per hour. You just divide 300 and 6.75 (Think as the 3/4 as quarters each 1 is .25) then you will get 44.4. To check your answer you would multiply 44.4 and 6.75 and get 299.7. This is not 300 but when you round that .7 to the nearest 10 you will get 300. Hope this helped.<span />